The Mammut Bionic HMS Carabiner is designed and developed for high performance climbing, and is crafted with beam technology, a special, high-precision hot forged method, to help reduce weight while maintaining hig breaking load capacity. The Bionic HMS has a large arc radius to provide easy locking with all safety devices and knots, and the key-lock guarantees easy placement. This Mammut carabiner is ideal for multipitch rock climbing, sports climbing, gym climbing, classic alpinism, mixes and ice climbing, and is also suitable for expedition climbing.

Rated 4 out of
5 by
Ansel from
Great Biner. Love the gate!Awesome screw lock that screws like Ron Jeremy himself. This thing is smooth and quite, yet feels solid as a rock. The gate has some good tension on it and is all around a classy looking device. It is 58 grams, but the only problem i can foresee (i don't have this issue due to the size of my gear loop "arcteryx a300a") is that the gear loop side is a bit small. Which could cause problems, when belaying a lighter person where there isn't as much tension on the device. This typically leads to the biner laying on its side and obviously in a much less safe situation. ,,For a little more in depth review, check out the review on YT. /watch?v=IWR2C0V3vGw

Date published: 2012-01-07

Rated 5 out of
5 by
Miguel from
My favorite HMSI've seen and used several different types of HMS biners, and this is definitely my favorite. The color is a little darker and less shiny than the picture, minor detail. I got the twistlock version and it feels great, it feels very solid but still very light. If anything, the only issue with it would be that be basket is kinda narrow, which may have trouble accommodating some wider belay loops or slings, but works just fine with the BD Momentum harness. It is easily opened with one hand and snaps back closed strongly and firmly, leaving no doubt it is solidly closed.

Date published: 2012-06-15

Rated 5 out of
5 by
Becca from
Smoothest autolocker out there!This is my favorite auto locking carabiner on the market. The gate requires only a swivel action instead of pushing it up then twisting. This may seem like a safety concern to some, but knowing the quality of Mammuts hardware and feeling the action in your hand, you know you are just fine. This is a pretty large carabiner, perfect for belaying or anchoring, but maybe not so much for those tighter situations at the chains.

Date published: 2014-12-02

Rated 5 out of
5 by
Zedong from
Coolest design ever and works at an affordable priceThis is one of my favourite biner! It is very cool looking with Mammut's unique I-beam construction of the body. Very light weight and the twist lock is smooth working. Doesn't take too much of extra strength nor hassle to twist open the biner unlike some other auto locking biners. Big D fits most devices too! ,,,,Yet another awesome product from Mammut! The other version the mythos was too small for some devices btw.

Date published: 2012-04-23

Rated 5 out of
5 by
Patrick from
Looks GREAT, performs just as well.My favorite locker by far. The screwgate is beautiful to use and you only ever need one finger. The tension on the gate is heavy enough to keep it from opening while you screw it shut, but light enough to make clipping in fairly easy. A little bigger than i expected, and i was glad to see that. Another well designed piece from Mammut that will look great in your rack (...and keep you from getting dead...).

Date published: 2011-10-25

Rated 4 out of
5 by
Andy from
If I had to do it over again, I would still buy it!I bought this to use with my Grigri 2 (because the blue screw gate matched the blue grigri perfectly! (although it doesn't really look like it in the picture)) I am very happy with it and would buy it again. The only down side is that the grigri doesn't really fit around the small side of it so I have to make sure it doesn't try to twist around or it gets a bit stuck. Other than that I love it.,,Andy

Date published: 2012-11-27

Rated 4 out of
5 by
Joseph from
not a great belay biner, good all-around HMSI used this as a belay biner for a while and was amazed how fast it started wearing ridges. The edges wear down really quickly when used for belaying. ,,,,Wouldn't use this for anything that is going to have a lot of rope moving through it for very long. Converted it to a general purpose HMS and couldn't be happier.

Date published: 2012-10-01

Rated 5 out of
5 by
Alexander from
It does what it's intended toThough I use BD products usually I must say that the Mammut has much smoother action in the screwgate that the BD. It's sturdy as all carabiners should be and has smooth opening action as well. Don't really know what else to say about a carabiner. It's solid.